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PIMXRT516SCVM5A 数据表(PDF) 76 Page - NXP Semiconductors |
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PIMXRT516SCVM5A 数据表(HTML) 76 Page - NXP Semiconductors |
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76 / 124 page  i.MX RT1160 Crossover Processors Data Sheet for Extended Industrial Products, Rev. 0, 04/2021 76 NXP Semiconductors Electrical characteristics The following figure shows a plot of the ADC sample time versus RAS. Figure 33. Sample time VS. RAS 4.8.1.1 12-bit ADC input impedance equivalent circuit diagram The following figure shows 12-bit ADC input impedance equivalent circuit diagram. 4 This resistance is external to the SoC. To achieve the best results, the analog source resistance must be kept as low as possible. The results in this data sheet were derived from a system that had < 15 Ω analog source resistance. The RAS and CAS time constant should be kept to < 1 ns. 5 See Figure 33, "Sample time VS. RAS". 6 1 LSB = (VREFH - VREFL) / 2^N, N = 12 7 ADC conversion clock at max frequency and using linear histogram. 8 Input data used for test is 1 kHz sine wave. |
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